20820822 has 16 divisors (see below), whose sum is σ = 45427392. Its totient is φ = 6309320.

The previous prime is 20820817. The next prime is 20820829. The reversal of 20820822 is 22802802.

It is a junction number, because it is equal to n+sod(n) for n = 20820792 and 20820801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20820829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157668 + ... + 157799.

It is an arithmetic number, because the mean of its divisors is an integer number (2839212).

Almost surely, 2^20820822 is an apocalyptic number.

20820822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20820822 is an abundant number, since it is smaller than the sum of its proper divisors (24606570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20820822 is a wasteful number, since it uses less digits than its factorization.

20820822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315483.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 20820822 is about 4562.9838921478. The cubic root of 20820822 is about 275.1055110279.

The spelling of 20820822 in words is "twenty million, eight hundred twenty thousand, eight hundred twenty-two".